Malicious PDF — malware analysis report

Static analysis result for SHA-256 332294d8610aada0…

MALICIOUS

PDF

34.8 KB Created: 2021-07-08 23:55:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fd75b2f23ad25dd72634858fd0acf7be SHA-1: 320d91becaca35598e532def22a2a5087ede551b SHA-256: 332294d8610aada0a51e027de662ca4689d312d1fc15f1ca52c05090c6c7fca9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/835599320/why-is-tiktok-free-game-hack PDF link annotation
    • https://3qblocks.com.tw/image/data/files/free-robux-codes-october-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-views-tiktok_GM835599320.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/cch-ly-robux-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/hack-roblox-apk-mod_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/pastebin-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-followers-on-tiktok-app_GM835599320.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/no-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/is-there-a-way-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-ballon-simolator-gem-hack_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-and-tix-online_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-robux-from-slingtv_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-make-a-cheat-on-roblox-roblox-studio-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3157 22880 bytes
SHA-256: 9209a291e71754cdb27025ddd8d454720119c58ae22574fc9880e09c0ed97fef
font_01_sfnt_off00006491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6491 18516 bytes
SHA-256: 3922eec792a46d61160131877f883be06ab7dcafa146616234d54efe2413236f

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